MOKO Block & Tackle Pulley by Moko - Thingiverse

A block and tackle pulley system uses two or more pulleys together to lift heavy objects more easily. It works by distributing the weight of the object equally between all pulleys, thereby decreasing the amount of force required to lift the object

Children ages 10 and up will discover how to construct several different pulleys for lifting heavy objects with the Block and Tackle Pulley Kit. Each kit includes parts and materials. In most cases, kits take less than one hour to complete. Dolls not included.

Build a Vintage Block & Tackle Pulley - YouTube

Simple Block and Tackle Pulley Demonstration

The trade off for decreasing the force required to lift the object is the distance by which the rope has to be pulled. If the 400 pound object needs to be lifted 50 feet in the air, then 100 feet of rope has to be pulled with a 200 pound force. Either way, 20000 joules of work has to be done, but using a block and tackle pulley system decreases the amount of force required to do the same work, thereby making it easier to achieve.

Bring vintage nautical flair to your home décor with this vintage hook. The Block & Tackle Pulley is topped off with a thick hemp rope knot, giving it a worn appearance. For a unique display, attach this piece to your entryway wall and utilize it as a coat or purse hook.